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- Path: sparky!uunet!dziuxsolim.rutgers.edu!ruhets.rutgers.edu!bweiner
- From: bweiner@ruhets.rutgers.edu (Benjamin Weiner)
- Newsgroups: sci.physics
- Subject: Re: Super-Strings
- Message-ID: <Jan.25.00.05.49.1993.28590@ruhets.rutgers.edu>
- Date: 25 Jan 93 05:05:50 GMT
- References: <1993Jan24.015612.4614@scorch.apana.org.au> <24JAN199310142815@csa1.lbl.gov>
- Organization: Rutgers Univ., New Brunswick, N.J.
- Lines: 31
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-
- adawal@scorch.apana.org.au (Adam Walsh) writes...
- >Pardon My ignorance but what is a Super String?
-
- A SuperString is made out of the same material as a SuperBall, those
- cute little bouncy things. Physics graduate students who know that
- the first problem in the _Princeton Problems in Physics_ is about a
- SuperBall will no doubt be happy to hear that the first problem in the
- forthcoming second edition is about a superstring ...
-
- OK, dumb jokes aside, superstrings are a candidate for a theory that
- explains, more or less, all the fundamental interactions of physics;
- a reference at a popular level is the book "Superstrings: A Theory of
- Everything?" The "string" part is that these theories consider
- fundamental particles to be strings rather than points, with the
- dimension of the string being incredibly small; the theory is often
- characterized as having a lot of dimensions with the extra dimensions
- being "rolled up," leaving only the 3+1 of ordinary spacetime. It has
- the attraction of maybe being the Big Mama of particle theory that
- finally explains it all, but it is fiendishly complicated.
-
- The "super" part is something called supersymmetry, which is popular
- in "everyday" particle physics as well; in it, there is a symmetry
- between fermionic (loosely, particles like quarks and electrons; the stuff
- of ordinary matter) and bosonic particles (loosely, particles that
- carry the interactions/forces, like the photon). So each fermion
- has a boson partner, and vice versa. No such partner particles have yet
- been discovered, though.
-
- I hope this has been informative and not misleading, because
- string theory is "not my department." (inside joke, sorry)
-